Year	Percent of GDP (Units)
1980	4.850
1981	44.377
1982	47.592
1983	50.658
1984	52.943
1985	46.186
1986	44.293
1987	46.325
1988	45.102
1989	44.823
1990	49.840
1991	9.509
1992	7.438
1993	18.881
1994	25.603
1995	25.746
1996	18.064
1997	16.659
1998	19.743
1999	19.735
2000	30.796
2001	34.989
2002	35.264
2003	33.897
2004	34.197
2005	36.870
2006	35.698
2007	34.462
2008	33.374
2009	32.641
2010	31.318
2011	33.462
2012	29.824
2013	27.491
2014	27.288
2015	26.237
2016	25.470
2017	24.672
2018	24.118
2019	23.032
2020	22.677
2021	25.469
2022	24.873
2023	24.075
2024	23.735
2025	24.061
2026	24.166
2027	24.068
2028	23.941
2029	23.818